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首页> 美国政府科技报告 >Electrical Resistivity Measurement of Mechanically Stabilized Earth Wall Backfill. Technical summary.
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Electrical Resistivity Measurement of Mechanically Stabilized Earth Wall Backfill. Technical summary.

机译：机械稳定土墙回填的电阻率测量。技术摘要。

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摘要

In Kansas, mechanically stabilized earth (MSE) retaining walls are typically backfilled with coarse aggregate. Current backfill material testing procedures used by the Kansas Department of Transportation (KDOT) utilize on-site observations for construction quality assurance and the American Association of State Highway and Transportation Officials (AASHTO) Standard T 288-12 (2012), “Standard Method of Test for Determining Minimum Laboratory Soil Resistivity.” T 288 is designed to test a soil sample’s electrical resistivity, which correlates to its corrosive potential. The test, based on material passing through a No. 10 sieve, is considered inappropriate for coarse aggregates and potentially leads to over-conservative designs. Additionally, T 288 is run on a sample from the aggregate source, but test results may not capture variability of the aggregate used in construction. Electrical resistivity imaging (ERI) provides a two-dimensional (2D) profile of the bulk resistivity of backfill material, thereby reducing uncertainty regarding backfill uniformity as compared to traditional sampling.

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